3(4)-4=.4(y-5)

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Solution for 3(4)-4=.4(y-5) equation: 


Simplifying
3(4) + -4 = 0.4(y + -5)

Multiply 3 * 4
12 + -4 = 0.4(y + -5)

Combine like terms: 12 + -4 = 8
8 = 0.4(y + -5)

Reorder the terms:
8 = 0.4(-5 + y)
8 = (-5 * 0.4 + y * 0.4)
8 = (-2 + 0.4y)

Solving
8 = -2 + 0.4y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-0.4y' to each side of the equation.
8 + -0.4y = -2 + 0.4y + -0.4y

Combine like terms: 0.4y + -0.4y = 0.0
8 + -0.4y = -2 + 0.0
8 + -0.4y = -2

Add '-8' to each side of the equation.
8 + -8 + -0.4y = -2 + -8

Combine like terms: 8 + -8 = 0
0 + -0.4y = -2 + -8
-0.4y = -2 + -8

Combine like terms: -2 + -8 = -10
-0.4y = -10

Divide each side by '-0.4'.
y = 25

Simplifying
y = 25

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